<template>
  <div class="menu-bar">
    <transition name="slide-up">
      <div
        class="menu-wrapper"
        :class="{'hide-box-shadow': isSettingShow || !isTitleAndMenuShow}"
        v-show="isTitleAndMenuShow"
      >
        <div class="icon-wrapper">
          <span
            class="icon-menu icon"
            @click="showSetting(3)"
          ></span>
        </div>
        <div class="icon-wrapper">
          <span
            class="icon-progress icon"
            @click="showSetting(2)"
          ></span>
        </div>
        <div class="icon-wrapper">
          <span
            class="icon-bright icon"
            @click="showSetting(1)"
          ></span>
        </div>
        <div class="icon-wrapper">
          <span
            class="icon-a icon"
            @click="showSetting(0)"
          >A</span>
        </div>
      </div>
    </transition>
    <transition name="slide-up">
      <div
        class="setting-wrapper"
        v-show="isSettingShow"
      >
        <div
          class="setting-font-size"
          v-if="showTag === 0"
        >
          <div
            class="preview"
            :style="{fontSize: fontSizeList[0].fontSize + 'px'}"
          >A</div>
          <div class="select">
            <div
              class="select-wrapper"
              v-for="(item, index) of fontSizeList"
              @click="setFontSize(item.fontSize)"
              :key="index"
            >
              <div class="line"></div>
              <div class="point-wrapper">
                <div
                  class="point"
                  v-show="defaultFontSize === item.fontSize"
                >
                  <div class="small-point"></div>
                </div>
              </div>
              <div class="line"></div>
            </div>
          </div>
          <div
            class="preview"
            :style="{fontSize: fontSizeList[fontSizeList.length - 1].fontSize + 'px'}"
          >A</div>
        </div>
        <div
          class="setting-theme"
          v-else-if="showTag === 1"
        >
          <div
            class="setting-theme-item"
            v-for="(item,index) of themeList"
            :key="index"
            @click="setTheme(index)"
          >
            <div
              class="preview"
              :style="{background: item.style.body.background}"
              :class="{'no-border': item.style.body.background !== '#fff'}"
            ></div>
            <div
              class="text"
              :class="{'selected': index === defaultTheme}"
            >{{item.name}}</div>
          </div>

        </div>
        <div
          class="setting-progress"
          v-else-if="showTag === 2"
        >
          <div class="progress-wrapper">
            <input
              class="progress"
              type="range"
              max="100"
              min="0"
              step="1"
              @change="onProgressChange($event.target.value)"
              @input="onProgressInput($event.target.value)"
              :value="progress"
              :disabled="!isBookReady"
              ref="progress"
            >
          </div>
          <div class="text-wrapper">
            <span>{{ isBookReady ? progress + '%' : '加载中...' }}</span>
          </div>
        </div>
      </div>
    </transition>
    <!-- <transition name="slide-right"> -->
      <ContentView
        :navigation="navigation"
        :isBookReady="isBookReady"
        v-show="isContentShow"
        @jumpTo="jumpTo"
      />
    <!-- </transition> -->
    <transition name="fade">
      <div
        class="content-mask"
        v-show="isContentShow"
        @click="hideContent"
      ></div>
    </transition>
  </div>
</template>
<script>
import ContentView from "@/components/Content";
export default {
  components: {
    ContentView
  },
  data() {
    return {
      isSettingShow: false,
      showTag: 0,
      progress: 0,
      isContentShow: false
    };
  },
  props: {
    isTitleAndMenuShow: {
      type: Boolean,
      default: false
    },
    fontSizeList: Array,
    defaultFontSize: Number,
    themeList: Array,
    defaultTheme: Number,
    isBookReady: Boolean,
    navigation: Object
  },
  methods: {
    jumpTo(href) {
      this.$emit("jumpTo", href);
    },
    hideContent() {
      this.isContentShow = false;
    },
    onProgressInput(progress) {
      this.progress = progress;
      this.$refs.progress.style.backgroundSize = `$(this.progress)% 100%`;
    },
    // 进度天松开后触发事件，根据进度条数值跳到指定位置
    onProgressChange(progress) {
      this.$emit("onProgressChange", progress);
    },
    setTheme(index) {
      this.$emit("setTheme", index);
    },
    setFontSize(fontSize) {
      this.$emit("setFontSize", fontSize);
    },
    showSetting(tag) {
      if (tag === 3) {
        this.isContentShow = true;
        this.hideSetting();
      } else {
        this.isSettingShow = true;
      }
      this.showTag = tag;
    },
    hideSetting() {
      this.isSettingShow = false;
    }
  }
};
</script>
<style lang='scss' scoped>
@import "../assets/styles/global.scss";
.menu-bar {
  .menu-wrapper {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: px2rem(48);
    display: flex;
    z-index: 101;
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0, 0, 0, 0.15);
    &.hide-box-shadow {
      box-shadow: none;
    }
    .icon-wrapper {
      flex: 1;
      @include center;
      .icon-progress {
        font-size: px2rem(26);
      }
      .icon-bright {
        font-size: px2rem(24);
      }
    }
  }
  .setting-wrapper {
    position: absolute;
    bottom: px2rem(48);
    left: 0;
    width: 100%;
    z-index: 101;
    height: px2rem(60);
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0, 0, 0, 0.15);
    .setting-font-size {
      display: flex;
      height: 100%;
      .preview {
        flex: 0 0 px2rem(40);
        @include center;
      }
      .select {
        flex: 1;
        display: flex;
        .select-wrapper {
          flex: 1;
          display: flex;
          align-items: center;
          &:first-child {
            .line {
              &:first-child {
                border-top: none;
              }
            }
          }
          &:last-child {
            .line {
              &:last-child {
                border-top: none;
              }
            }
          }
          .line {
            flex: 1;
            height: 0;
            border-top: px2rem(1) solid #ccc;
          }
          .point-wrapper {
            position: relative;
            flex: 0 0 0;
            width: 0;
            height: px2rem(7);
            border-left: px2rem(1) solid #ccc;
            .point {
              position: absolute;
              width: px2rem(20);
              height: px2rem(20);
              top: px2rem(-7);
              left: px2rem(-10);
              background: white;
              border: px2rem(1) solid #ccc;
              box-shadow: 0 px2rem(4) px2rem(4) rgba(0, 0, 0, 0.15);
              border-radius: 50%;
              @include center;
              .small-point {
                width: px2rem(5);
                height: px2rem(5);
                background: black;
                border-radius: 50%;
              }
            }
          }
        }
      }
    }
    .setting-theme {
      height: 100%;
      display: flex;
      .setting-theme-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: px2rem(5);
        box-sizing: border-box;
        .preview {
          flex: 1;
          border: px2rem(1) solid #ccc;
          box-sizing: border-box;
          &.no-border {
            border: none;
          }
        }
        .text {
          flex: 0 0 px2rem(20);
          font-size: px2rem(14);
          color: #bbb;
          @include center;
          &.selected {
            color: #333;
          }
        }
      }
    }
    .setting-progress {
      position: relative;
      width: 100%;
      height: 100%;
      .progress-wrapper {
        width: 100%;
        height: 100%;
        @include center;
        padding: 0 px2rem(30);
        box-sizing: border-box;
        .progress {
          width: 100%;
          -webkit-appearance: none;
          height: px2rem(2);
          background: -webkit-linear-gradient(#999, #999) no-repeat, #ddd;
          background-size: 0 100%;
          &.focus {
            outline: none;
          }
          &::-webkit-slider-thumb {
            -webkit-appearance: none;
            height: px2rem(20);
            width: px2rem(20);
            border-radius: 50%;
            background: white;
            box-shadow: 0 px2rem(4) px2rem(4) 0 rgba(0, 0, 0, 0.15);
            border: px2rem(1) solid #ddd;
          }
        }
      }
      .text-wrapper {
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        color: #333333;
        font-size: px2rem(22);
        text-align: center;
      }
    }
  }
  .content-mask {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 102;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
  }
}
</style>